The average age of a husband and a wife was 23 year when they were married 5 year ago. The average age of the husband, the wife and child, who was born during the interval is 20 years now . How old is the child now?
Correct Answer: 4 year
Explanation:
Age of child = sum of age of husband , wife and child - sum of age of husband and wife.
= [(20 x 3) - (23 x 2 + 5 x 2)] years
= 4 years.
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